Corrections

Endgames: Distributions

BMJ 2009; 338 doi: https://doi.org/10.1136/bmj.b507 (Published 10 February 2009) Cite this as: BMJ 2009;338:b507

The answer for this statistical question contains an error (BMJ 2008;337:a2600, doi:10.1136/bmj.a2600). The third sentence should read: “The Poisson distribution is helpful for ‘back of the envelope’ calculations because, when the number of events is reasonably large, the standard deviation of the distribution is the same number as the square root of the mean [not ‘the same number as the mean’].”

Notes

Cite this as: BMJ 2009;338:b507

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